Completed

Comparisons of the Astigmatic Power of Toric Intraocular Lens Using Three Toric Calculators: AcrySof, TECNIS, and iTrace Toric Calculator

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What is being collected

Data Collection

Collected from past medical records and data - Retrospective
Who is being recruted

Astigmatism+2

+ Cataract

+ Eye Diseases

From 33 to 87 Years
+6 Eligibility Criteria
See all eligibility criteria
How is the trial designed

Cohort

Tracking disease incidence in order to identify risk factors and understand disease progression over time.
Observational
Study Start: January 2013
See protocol details

Summary

Principal SponsorYonsei University
Last updated: January 27, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: January 1, 2013

Actual date on which the first participant was enrolled.

Purpose of this study is to compare the astigmatic power of the toric IOL obtained from the AcrySof toric calculator, TECNIS toric calculator, and iTrace toric calculator in a group of patients with preoperative with-the-rule (WTR) and against-the-rule (ATR) corneal astigmatism. The study included 100 eyes with cataract and greater than 0.75 diopter of corneal astigmatism, and the subjects were divided into WTR and ATR group. Keratometric value was measured using autokeratometry, IOLMaster partial coherence interferometry (PCI), iTrace incorporating corneal topography and ray-tracing aberrometry. Based on measured values, toric IOL power calculations were performed using AcrySof, TECNIS and iTrace toric calculators.

Official TitleComparisons of the Astigmatic Power of Toric Intraocular Lens Using Three Toric Calculators: AcrySof, TECNIS, and iTrace Toric Calculator
NCT01978106
Principal SponsorYonsei University
Last updated: January 27, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.
Design Details

100 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Cohort

These studies follow a group of individuals with common characteristics (such as a condition or birth year) over a specific period to study health outcomes or exposures.

Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

From 33 to 87 Years

Range of ages for which participants are eligible to join.

Healthy volunteers allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

AstigmatismCataractEye DiseasesLens DiseasesRefractive Errors

Criteria

2 inclusion criteria required to participate
Subjects who planned to undergo cataract removal by phacoemulsification
Subjects with preoperative corneal astigmatism greater than 0.75 D, as determined by autokeratometry
4 exclusion criteria prevent from participating
Subjects with more than 2.74 D of corneal keratometric value from autokeratometry
a history of intraocular or corneal surgery and ocular trauma
biomicroscopic evidence of corneal disease that could affect corneal astigmatisms
contact lens wearer

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Study Objectives

Study Objectives

Primary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 1 location

Suspended

Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine

Seoul, South KoreaOpen Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine in Google Maps
CompletedOne Study Center